/Engine/Source/Runtime/SlateCore/Public/Types/SlateAttributeMetaData.h
Execute UpdateOnlyVisibilityAttributes on every children of the widget.
static void UpdateChildrenOnlyVisibilityAttributes ( [SWidget](API\Runtime\SlateCore\Widgets\SWidget) & OwningWidget, [EInvalidationPermission](API\Runtime\SlateCore\Types\FSlateAttributeMetaData\EInvalidationPermission) InvalidationStyle, bool bRecursive )